nyuwa

Thank you.
Probably I am simply too stupid for this.
I installed this plugin (I tried similar plugins before that), changed two color settings and tried to apply those to a test page.
No change at all – and an attempt at applying “highlight” (= supposed to be a dirty yellow) to a piece of text gives me an equally dirty green.
Maybe I have to resign to the idea, that WordPress is not up to the task. Which appears to be very strange to me, since every single software I know of, is capable of offering a choice of colors, including those primary colors.

I am really sorry for having wasted your time.

Thank you very much for your reply.
Unfortunately, I have absolutely no idea what (and how) I am supposed to do with this coding. All I want to have, is a simple color picker, where I can choose a color I like – for PIECES OF TEXT and not the entire theme.
Like the one, offered by the classic editor.
Can that be so difficult?

I am really sorry, that my lack of education causes so much trouble.